Edwin f



- E. F. HULBERT.

METHOD oF secumNG VESSEL cLosuRes. v APPLICATION FILED APRZ. |914- IIENEWED APR- II|II9I9 1 ,319,083, Patented Oct. 21,1919.

'WITNESSS INVENTOR M @Mw @7m MMM I UNITED STATES PATENT OFFICE.

EDWIN F. HUIIBERT, 0F MILWAUKEE, WISCONSIN, ASSIGNOR T0 NATIONAL PAPER CAN COMPANY, OF SOUTH NORWALK, CONNECTICUT, A CORPORATION 0F DELAWARE.

METHOD OF SECURING VESSEL-CLOSURES.

Specification of Letters Patent.

Patented Oct. 21, 1919.

Application le April 25, 1914, Serial No. 834,362. Renewed April 11, 1919. Serial .No. 289,46'3.

To all whom z't may concern Be it known that I, 'EDWIN F. HULBERT a citizen of the United States, residing at Milwaukee, in the county of Milwaukee and State of Wisconsin, have invented a new and useful Method of Securing Vessel-Closures, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming part of this specification, in which Figure 1 is a partial section showing the flanged closure in place, and Figs. 2, 3, 4 and 5 are similar views showing the successive operations performed in securing the closure in place.

My invention relates to the securing of end closures in cans or similar packages, whether made of paper, metal, or other material.

The object of the invention is to provide a simple and edeptive method which will give a strong closure, resistant against )ars or shocks in shipping,.handling, etc. The invention is particularly applicable to the Securing of flanged closures in paper cans, although it may be applied to other receptacles and other materials. The main object of my invention is to lock the closure in place without the necessity of an interior mandrel on which the receptacle body is supported. Heretofore such closures co-uld be locked in place only at one end, owing to the necessity of an interior mandrel support; whereas my method provides for locking or seaming the closure at one or both ends, on account of doing away with. the necessity for an interior supporting mandrel.

In Fig. 1, 2 represents the side wall of the can or receptacle and 3 the closure having a circumferential'outwardly projecting flange 4. In the first operation of the device an exterior circular die 5 is used having a circumferential interior recess as shown at 6 and which die is preferably made in sections. An eXpansible interior die, part of y "which is shown at 7 -is used in connection with the outer die andin the first operation the parts of the inner die 7 are forcedout to cause the lips -on the inner die to crimp the walls of the closure flange and the can.

body outwardly into the groove in the outer die or anvil, all as shown in Fig. 2. In the next movement, as shown in Fig. 3, the end die 8 having a depending edge portion and sections, and a new expanding inner die 10 are used, but the pinching action between thesedies remains the same as in the first movement, and the endwise moving die 11 acts downwardly, rolling-over the registering portions of the flange and receptacle and into the seam form as shown.

In the fourth and final step, shown in Fig. 5, the inner and outer dies 12 and 13 'are again changed and the order of movement is reversed. That is, the endwise moving die 14 moves downward until it rests on the recessed portion of the anvil 12 carrying with it the rolled-over seam portion until this rolled-over seam portion is brought in contact with the bottom 3 of the cap. The

parts of the expanding inner ydie 13 are then pressure 'exerted lby this inner die is suffi# cient to tightly corn-press the folds together, lock the parts in place by forcin them into the bead or recess in the wall o the receptacle and give a hard Wearing edge.

The advantages of my invention result mainly from doing away with the need for interior mandrel support and providing for securing closures to both ends of the receptacle, if desired. This is accomplished by the pinching action of the inner and outer dies, which gives sufficient support for the action of the endwise moving die. The locking of the seam in the bead gives a strong, secure joint, and the package is adapted to withstand blows and shocks. Changes may be made in the material used, the shape and size ofthe receptacle and closure, etc., and the steps of the operation may be changed somewhat from those as shown, without departing from my invention.

I claim:

1. The method of closing a can, consisting in placing a flanged cap within the open end of the can body, pinching together and y beading the base of the flange together with the registering portion of the can body and thereby supporting the can against endwise movement, and vrolling over the edges of the flange and body by endwise pressure while the can is thus supported, substantially as described.

2. The method of closing a can, consisting in placing a flanged cap within the open end of the can body, pinching together and beading a portion of the flange together with the registering portion of the can body and thereby supporting the can against endwise movement', and rolling over the edges of the flange and body by ,endwise pressure while the can is thus supported, substantially as described.

3. The method of closing a can consisting `in placing a flanged cap within the open end of the can body, pinching together a portion of the flange together with the reg istering portion of the can body and thereby supporting the can against endwise movement, and rolling over the edges of the flange and body by endwise pressure while the can is thus supported, substantially as described.

4. The method of closing a can, consisting in placing a flanged dished cap Within the open end of the can body, pinching and beadingaportion ofthe flange together with the registering portion of the can body between an outer die surrounding the can body and an inner die inserted in the dished end of the cap, and thereby supporting the can against endwise movement, and rolling over the edges of the flange and body by endWise pressure while the can is thus supported, substantially as described.

5. The method of closing a paper can in which the can is engaged upon the exterior only, consisting in placing a dished flanged paper cap within a paper can body, pinching together the base of the flange together with the registering portion of the can body between relatively movable inner and outer dies extending into the dished end of the cap and surrounding the can body respectively, rolling over the edges of the flangeand body by the application of endwise pressure to form a rolled closure seam, and supporting the can against such endwise pressure bymeans of the pinching action of the dies, substantially as described.

6. The method of closing a paper can in which the can is engaged upon the exterior only, consisting in placing a dished flanged paper cap- Within the open end of a paper can body, pinching together and beading the base of the flange together with the registering portion of the can body by the action of relatively movable dies inserted within the dished end of vthe cap and surrounding the can body respectively, rolling over the edges of the flange and body by the application of endwise pressure thereby forming a rolled closure seam, and supporting the can against such endwise ,pressure by means of the pinching action of the dies on the beaded portion of the can, substan` tially as described.

' 7. The method of closing a can consisting in placing a flanged cap within a can body, pinching together a portion of the lHarige with the registering portion of the can body thereby forming an inwardly opening groove in the flange and supporting the can against endwise movement, rolling over the edges of the flange and can body by endwise pressure While the can is thus supported, and thereafter forcing a part of such rolledover edges into the groove, substantially as described.

In testimony whereof, I have hereunto set my hand.

EDWIN F. HULBERT. Witnesses:

MARION Il. ROBERTS, JOHN B. LAWRENCE. 

